Home / 1,485.18-2,227.71-389.53

Finding the Fourth Proportional to 1,485.18, 2,227.71 and 389.53

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Solution

The fourth proportional to 1,485.18, 2,227.71 and 389.53 is: 584.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.18 : 2,227.71 = 389.53 : x
  2. Step 2: Convert to fraction form
    1,485.18/2,227.71 = 389.53/x
  3. Step 3: Cross multiply
    1,485.18x = 2,227.71 × 389.53
  4. Step 4: Simplify right side
    1,485.18x = 867,759.88
  5. Step 5: Solve for x
    x = 867,759.88/1,485.18
  6. Step 6: Final answer
    x = 584.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.